Electric-line-wire insulator



J. G. DECKER- WELECTRIC PINE WIRE INSULATOR. APPLICATION FILED MAY 24, 1918.

1,382,483. Patented June 21, 1921. 271+ 1 5 {14L 1 g j?) w UNITED STATES PATENT OFFICE.

JOHN G. DECKER, OF STROUDSBURG, PENNSYLVANIA.

ELECTRIC-LINE-WIBE INSULATOR.

Application filed May 24, 1918. Serial No. 236,343.

T 0 all whom it may concern:

' Be it known that I, JOHN G. DECKER, a.

citizen of the United States, residing at Stroudsburg, in the county of Monroe and State of Pennsylvania, have invented certain new and useful Improvements in Electric-Line-Wire Insulators, of which the following is a specification.

This invention relates to insulators, and pertains especially to the class of insulators applicable to telegraph, telephone and trolley wires.

The object of the invention is to provide an insulating device of such .novel and peculiar construction as to afiord expeditious means for applying electric wire thereto and for holding the wire therein without twisting or bending the wire from straight condition either in applying or holding the Wire.

A further object of the invention is to provide a wire insulating device having the usual screw socket applicable to the crossbars of telegraph, telephone and trolley posts, and having a solid spherical head,

and a peculiarly shaped channel or groove between the head and the socket for introducing and holding an electric wire free to be drawn lengthwise and to be removed through the groove by lateral movement of the wire in the groove or wire passageway.

A still further object of the invention is V to provide an insulator of this character with an annular tie wire groove adjacent to the head of the insulator, and a similar groove adjacent to the bottom or lower end of the insulator, so that the insulator may be used as an anchor in stretching or repairing the line wire, or at intervals through out the line as a tie post.

Various other objects, advantages and improved results are attainable in the practical manufacture and application of the invention.

In the accompanying drawings forming part of this application:

Figure 1 is an elevation of the insulator.

Fig. 2 is a sectional view taken on the dotted line A-A, Fig. 1.

Fig. 3 is a cross section taken on. the dotted line B-B, Fig. -1.

Fig. 4 is a similar view taken on the dotted line C-C, Fig. 1.

Fig. 5 is an elevation of a modification partly broken away.

The same reference characters denote the same parts throughout the several views of the drawings.

In practical application of insulators of this character, which areusually composed of glass, porcelain or similar material, it is well known that they are subject to contraction and expansionunder varying weather conditions; therefore, it is essential to provide an insulator in avoidance of such contraction and expansion as far as possible, and yet of such construction as to permit the insertion and removal of a line wire, and for holding the wire for free longitudinal movement, and so that the wire may have sufficient play in the insulator as to prevent breaking of the wire-holding part of the insulator. It is also essential that provision be made to avoid turning, twisting and bending the wire in placing, holdingand removing it with respect to the insulator, so that the wire may be quickly and expeditiously slipped intoproper position.

In carrying out my invention I employ the usual glass or porcelain insulator having a solid conical or spherical head member 1, a body portion 2, having the usual base comprising annular flanges 3 .and 4.- with a groove 5 therebetween, and the body portion 2 is provided with the ordinary screw socket 6 adapted to fit screw pins on crossheads of. telegraph, telephone and trolley posts of common use, or the insulator may be applied to the end of such sts as usual.

The essential feature of the lnvention consists in forming a peculiarly shaped passage for lateral movement of the line wire 7 into and out of a peculiarly shaped central holder. Said passage is formed by a continuous serpentine-like groove or slot having parallel walls extending straight through the spherical head member 1, so as to avoid twisting, indenting or bending the line wire 7 therein or thereby. Said passage starts with a mouth 8 in the side of the head member 1, and preferabl'yadjacent to the body portion 2 of the insulator for the entrance and exit of the wire 7. The upper lip 9 of the mouth 8 overhangs the lower lip 10 enough to protect the mouth from collecting any drippings or other elements which may fall from the head member 1. A passage member ,11 extends downwardly and inwardly from the mouth 8 to a shoulder 12, another passage member 13 extends from the shoulder 12 upwardly into the head member, and an arc-shaped passage member 14 extends downwardl from the passage member 13 to a vertical el ongation or seat 15 located centrally of the intersection of the head member and the body member. A SOlld. portion 16 is formed centrally over the seat and is connected with the body member by a neck 17. Said passage members, whlch constitute the line wire slot, form a shoulder 18 adjacent to and opposite a shoulder 19 of the seat 15. The elongated seat is such as to permit vertical movement of the line wire without displacement. Obviously, the wire 7 must be pulled or pushed laterally over the said shoulders in placing and removing the wire with respect to its elongated seat 15. The solid center 16 directly over the wire seat with the thick neck 17 constitute a substantial abutment for the upper thrust of the line wire, and said center and neck are not subject to fracture on account of contraction and expansion, or by manipulation of the wire, or from accidental dropping or contact with foreign objects. A sagging or slack wire has a solid support in the material between the socket 6 and the seat 15.

The above described insulator is for use on a series or multiple of posts intervening tie or terminal posts, but the same insulator may be used as an anchor or on tie or terminal posts by applying a tie wire to the semicircular groove 20 extending from one end to the other of the wire seat 15, and twisting the tie wire around the line wire to hold the latter fixed to the insulator during splicing or repairing the line wire.

The insulator is provided with a circular groove 21 adjacent to the bottom thereof for tying the wire when the latter is'to be run at an angle or diagonally, and the location of this groove relative to the lower end of the insulator is important, in that the wire pull is close to the large end of the socket stem and adjacent to the post, thereby avoiding the usual likelihood of fracture or breaking off of the screw stem under the strain of wire stretching. This is an important feature of the device for preserving the screw pins or stems.

Referring to Fig. 5, a modified groove or wire passage 22 is shown, having a curved mouth 23, a shoulder 24 above the horizontal plane of the wire seat or elongation 25, and the parallel walls of this passage are in serpentine or compound curves extending straight through the spherical head 2.6 to opposite sides thereof.

Itwill be understood that there is no tying of the line wire to the series of intermediate insulators throughout a telegraph or tele phone line, whereby the expense of tie wire and the time and labor of applying it is avoided.

It will also beobserved that the liability of accidental displacement of the line wire with respect to the insulator is avoided; that said wire has ample play in the elongated seat for lengthwise movement and stretching, and that the insulator is not weakened by reason of the wire slot and grooves therein.

I do not wish to be understood as confining my invention to any particular size or insulating material, nor to the particular angle and location of the entrance and exit sage, but I reserve the right to make such changes and variations in the manufacture and practical application of the invention as may come within the scope of the appended claim.

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A device of the type described comprising an insulator of the electric line-wire type, the body portion of said insulator having a wire-receiving passage extending transversely therethrough and of continuous serpentine-like outline, starting with a mouth in the side of the head of said body-portion, the upper lip overhanging the lower lip of said mouth and including a downward extension reversely upwardly curved and again reversely curved upwardly and finally extending vertically downward, forming a seat for the line-wire.

In witness whereof I hereunto set my hand in the presence of two witnesses.

JOHN G. DECKER.

Witnesses:

V. S. LODER, E. E. MIoHAEIs.

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